it didn't suck!

Even with Arnold impossibly playing the Terminator at soon 70, it was a let up and totally watchable as a action flick. The effects were pretty good with a good job on animating Arnold.
Don't think I'm giving it too much slack, I went in expecting garbage in the lines of the really boring third movie.
The trailer for "Genysis" did not look good at all and horrendous production stills had me thinking it was unwatchable. But the quality was there and the actors did great. The cheesy lines that had to be said that bothered me in the trailer blended in better when watching the movie.
It was very popcornish action movie-like, not trying to be realistic like the fourth one with woody Bale who seems to carry the realistic gloomy feel to all this movies.
It was a quite bit more humorous than 3 and 4 but honestly, how could they have gone another way? Effects and explosions are not as exciting and novel as it was "back then" so good action movies today have harder time to get by on stunts. They have to have characters and a story to back it up.
This movie also touch on the fact that we live in the
remake-decade. The movie listings in newspapers from ~20 years ago (mission:impossible, jurassic park, Terminator 2, Turtles) could just as well be a screenshot of IMDB today.
Apparently, they have figured out that my generation who grew up and saw the big hit movies will always come back and relive their youth again.
This one - much like Jurassic World - does not try to reinvent the franchise at all, just frolics in respectful references to the original.